I've been to at least a dozen, these have been my favorites. You can't go wrong with any of the ones in Garland. You CAN go wrong with a place that tries to mix salvadoran and mexican. You can go VERY wrong with restaurants run by former Gloria's managers(Mario Sabino's).

Check with Vicky Zamora, the owner of La Victoria on Haskell near Ross - see http://www.yelp.com/biz/la-victoria-d... for contact information. Vicky is a Tex-Mexpert and knows a woman in East Dallas who makes "the abolsute best pupusas" fresh to your order out of her home.